Camco 4500W 240V 9.75"H Water Heater Duron Fold Back. This low watt density water heater features a 1-3/8" better element for efficient heating. It includes a gasket and detailed instructions for easy installation. Designed for State Industries manufactured Duron tank water heaters, this water heater has a minimum tank diameter of 13" and is UL/CSA listed for safety. Backed by a 1-year warranty.